This works reallly slick for my ATV, but too steep for my side by side.  I just used the loader tractor to dig a ditch, set this on top.  I have it in the corner of my corralls, so I can just drive in and check cattle or get to where ever I need.  When bringing cattle into the corrall, I just swing a gate or panel accross this opening.  I will get the exact measurements, but my polaris atv crosses it fine. Approx 5 ' wide and 10' long and 20 inches tall. 

 $350